Electrical controlling mechanism



June 26, 1923.

H. E. STAHL ELECTRICAL CONTROLLING MECHANI SM 5 Sheets-Sheet 1 Filed Sept. 23', 1 22 ATTORNEYS.

June 26, 1923. 1,459,756

H. E. STAHL ELECTRICAL CONTROLLING MECHANISM Filed Sept. 23, 1922 5 Sheets-Sheet 3 I ATTORNEYS.

June 26, 1923.

H. E. STAHL ELECTRICAL CONTROLLING MECHANISM Filed Sept. 23. 1922 5 Sheets-Sheet 4 CONTROLLER MAGNETIC SWITCH f" ATTORNEYS.

June 26, 1923. 1,459,756

H. E. STAHL ELECTRI CAL CONTROLLING MEGHANI SM Filed Sept. 23, 1922 5 Sheets-Sheet b ATTORNEYS.

Patented June 26, 1923.

UNITED STATES 1,459,756 PATENT OFFICE.

HARRY E. STAHL, or 'rnEN'roN, NEW JERSEY, ASSIGNOR TO THEwI IJnn'YooMr ANY,

INCORPORATED, or PHILADELPHIA, PENNSYLVANIA, A CORPORATION or PENN- SYLVANIA.

ELECTRICAL CONTROLLING MECHANISM.

Application filed September 23, 1922.

To all whom it may concern Be it known that I, HARRY E. STAHL, a citizen of the United States, residing at Trenton, county of Mercer, State of New Jersey, have invented a new and useful Electrical Controlling Mechanism, of which the following is a specification.

One object of my present invention is to devise a novel construction and arrangement of an electric [controller wherein certain of the co-operating contacts automatically control at the proper time the introduction into and'the cutting out from the working circuit of resistance which is of such strength that a sudden shock and strain is not imparted to the driven mechanism.

Another object is to devise a novel electric' controller in which the co-operating contacts engage with each'other without a wiping action, such contacts being electrically connected with the different phases of a motor whereby after the mechanism being drivenhas travelled a desired distance or made a desired number of revolutions in one direction, its direction of revolution will be reversed for a desired number of revolutions.

Other objects are to devise an electric controller in which the timing will be accurate and can be adjusted to vary the time at which the different operations are to take place, in which the contact points can be easily and quickly replaced, in which mechanism of different sizes and power can be controlled, in which the contacts opening one circuit are positively disengaged prior to the closing of another circuit, and in which by varying the speed of the pilot motor which drives the controller the number of reversals in a given time of the mechanisms driven by the controller are correspondingly varied.

With the above and other objects in view as will be hereinafter more clearly set forth, my invention comprehends a novel construction and arrangement of an electric controller.

It further comprehends a novel wiring diagram.

For the purpose of illustrating my invention, I haveshown' in the accompanying drawings a typical embodiment thereof which is at present preferred by me, since this embodiment will be found in practice to give satisfactory and reliable results. It is,

Serial No. 590,120.

however, to be understood that the various instrumentalities of which my invention consists can be variously arranged and orga'niz'ed and that my invention is'not limited to the precise arrangement and organization of these instrumentalities as herein shown and described.

Figure 1 represents a top plan view of a controlling mechanism, embodying my invention;

Figure 2 represents a rear elevation, partly in section, of Figure 1.

Figure 3'represents a section on line 33 of Figure 1.

Figure 4 represents a section on line 4:4 of Figure 1.

Figure 5 represents a section on line 55 of Figure 1.

Figure 6 represents a section, on an enlarged scale, of two contact members and certain of their adjuncts.

Figure '7 represents, in perspective and in detached position, a pair of contacts, their insulated bar and rock arm.

Figure 8 represents a sect-ion on line 8-8 of Figure 7.

Figure 9 represents a section on line 99 of Figure 1.

Figure 10 represents a wiring diagram.

Figure 11 represents a front elevation of the controller.

Similar numerals of reference indicate corresponding parts.

Referring to the drawings:

1 designates the base or supporting framework which, as illustrated, is in the form of spaced bars, to which are connectedthe end members 2. 3 designates the driven shaft, whichis ournalled in the end members 2 and provided with a gear a by means of which it is continuously driven by any desired source of power and, in practice, preferably by a pilot motor. The end members 2 are adapted to receive a removable casing 5, which contributes with said end' members to in close the working parts. The end members are connected by a binding post support 6, which carries the binding posts 7, 8, 9, 10, 11 and 12, respectivelv. The end members 2 are connected above the shaft 3 by means of the spaced longitudinally extending bars 13 which carry the cross bars let and the cross bars 15. The cross bars 15, see Figure 1, are

connected at'their freeends by means of a bar of insulating material 16, in which is mounted the contacts 17 and 18, each of which is constructed and mounted in the same manner, so that a description of one will suflice for both.

Referring now more particularly to Figure 6, the contact 17 has a rearward extension 19 which is received in the recess 20 in the lower end of a headed rod 21, and is secured in place by means of a set screw 22. The rod 21 passes through the bar 16, which latter is provided with an enlarged recess 23, in which :is positioned a spring 24:, which bears against a head 25 of the rod 21, so that the tendency of the spring is to move the contact 17 into its lowermost position. The upper end of the rod 21 is threaded to rcceive the nuts 26, one of which serves as a lock nut, and a nut 27 is provided to secure in place the conductor tern'iinals. The lower nut 26 preferably bears against a washer 28. The contacts 17 and 18 cooperate respectively with the contacts 29 and 30, see Figures 2 and v7.

These contacts 29 and 80 are carried by an insi'ilated support 31, preferably in the form of a bar secured in any desired manner to a rock arm 32, and, as illustrated, the insulating support 31 is recessed, as at 33, to receive the extension 3% of the rock arm 82, said extension being secured in position by means of a fastening device 35.

Each rocker arm contact such as, for ex ample, the contact 29, see Figures 6 and 7, is provided with a stem 36 which is seated in a recess 37 in the head 38 01 a rod 39, and

is secured in position by means of a fastening device 10, such as, for example, the set m screw shown. Ll'lG rod 39 passes through the insulating support 31, and has its outer end threaded to receive the nuts ell, a washer 12 being preferably provided which bears against the insulated support 31. Since all of the contacts carried by the different rocker arms are constructed and secured in position in a similar manner, a detailed description of one will suiiice for all. The rocker arm 32 at its inner end is pivotally connected at to a bracket 4 1, see Figure 4:. This rocker arm 32 actuated by a cam fixed to the shaft 3 and having the operative cam surfaces 4:6.

Referring now to Figure 1, the cross bars 14L have connected with them, by means of fastening devices 17, an insulated contact 1 support 18, which is in the form of a bar,

in which are resiliently mounted a pair of contact members 49 and 50, and a pair of contact members 51 and 7% which are resiliently mounted in a similar manner to that already described with reference to Figure 6.

52 designates a rock arm, pivotallv car ried at 53, by a bracket 54-, which is secured to one of the bars 13. The rock arm 52 .is constructed in a similar manner to the rock arm 32, and carries a pair of contact devices 55 and 56. The rock arm 52 is controlled by means of a cam 57 on the shaft 3. A

dcs -.tes a roclr arm. pivotally supported an 59.. in the bracket 60. carried by are of the bars 13. This rock arm carries, in a similar manner to the rock arms 32 and 52, a pair of contact members 61 and 62, respectively. This roclr arm is controlled by means of a cam carried by the shaft ine oi. the cross bars 14; carries a slotted post (54: in which is pivoted, at 65, a lever (37,, the free ends of which are positioned in the slots oi the heads 6?. and 6 of the rods and 1. respectively, said rods passing through apertures in the cross bars 15. The rod 70. connected with the head 68, bears at its lower end against the bottom wall of the in the rock arm 52.

recess r2 in a similar manner, the plunger rod 71 of the plunger head 69 be rs against the bottom wall of recess 7 in the rock arm 58.

The binding post 7 is connected. by a line 75, see Figure with the contact member 17'. The contact member 17 is connected by a line 76 with the contact n'icmber 50. The iontact n'ielnber 50 is connected by a line 77 with the contact member 74. The contact members and 51 are connected by a line 78. The contact member 18 connected with the contact member 51, by line 79. The contact member I F; connected b a line 80 with the binding post 12. The binding post 8 is connected by a l ne 81 with the contact member The cont member is connected by a line 82 with the contact member 61,. The contact members 56 and 61 are connected to each other by a line 83 and with the binding post 11 by means of a line 842. he binding post 9 is connected with the contact member 29 by means of a line see Figure and the binding post 10 is connected with the contact menibcr 30 by means of line 86.

Reterrino nor. more ].iarticularl' v to Figure 0, 8? ates an lci tric motor which is inter-geared with the mechanism to be controlled, tor example. awashng machine of the oscillatory type. 89 designates an elect .0 main line switch having the lines 90, 91 and 92. the iine 91 when the switch is closed leading by line 3 to one of the motor windings. A line 9 1 connects the magnetic switch S9 wth the line '3 and is provided, with a manually controlled switch 05. A line 96 is connected with the magnetic switch and with the binding post 8 of the controller. A. line 9'? connects the binding post 7 w th the resistance 93 which latter is connected by a line 99 with the binding post 9 of the controller. line 100 is connected with line 9:) and a wind ng of the motor 87. A line 101 is connected w th the binding post lll) 10 and with a resistance 102 which in turn is connected by line 103 with the binding post 12. A line 10 1 connects line 101 with a winding of the motor. A line 105 connects the magnetic switch with the binding post 11. The lines 100 and 10t-connect with one winding of the motor 87 and the lines 93 and 94 connect with the other winding of the motor 87. lVhen the manually controlled switch 95 is operated to close the circuit, the circuit is closed through the magnetic switch. Thisenables one to time the reversing operation so that two machines will not be reversing at the same time.

In the operation, it will be understood that the shaft is revolved at a desired or predetermined speed. The cam 15 actuates the rock arm 32 to cause the contacts 29 and 30 to engage respectively with the contacts 17 and 18 at which time the resistance 98 or 102 is cut out while when such contacts are out of engagement theresistance 98 or 102 is in circuit. When the resistance is in, the binding posts 7 and 8 are short circuited while when the resistance is out, the binding posts 8 and 9 are short circuited. Then the direction of the motor is reversed when the resistance is in, the binding posts 11 and 12 are short circuited and when the resistance is out, the binding posts 10 and 11 are short circuited. The current flows from the magnetic switch to line 96 through the binding post 8 and from the magnetic switch through the line 105 to the binding post 11. The line 93 may be considered as the neutral line connected to the two different phases of the motor winding. During the revolution of the driving shaft the current passes through the resistance 98 and as soon as the contacts 29 and 30 engage the contacts 17 and 18, the resistance 98 is cut out and the current passes by line 100 to one phase of the motor winding. On the further revolution of the shafts 3, the resistance 102 is cut in, and as soon as the further revolution of the cam 45 raises the rock arm 32 to cause the contacts 29 and 30 to again engage the contacts 17 and 18, the resistance 102 is cut out and the current passes from binding post 10 to line 104; to the other phase of the motor winding so that the direction of rotation of the motor and the parts driven thereby is reversed.

The cams 45, 57 and 63 are adjustably mounted on the shafts 3 in order that the timingof the different operations may be varied as desired by rotatively adjusting; the nosi .ion of such cams on the shaft 3, as will be apparent to those skilled in this art.

It will be noted that as one rock arm 58 or is raised, the other rock arm 58 or 52 is positively lowered due to the provision of the plungers 71 and and the lever 67 cooperating" therewith, so that there is no possibility of the contacts 61 and 62 being; in engagement with the contacts 51 and 74.-

at the same time that the contacts 55 and are in engagement with their co-opcratingg contacts and 50, respectively, thereby preventing the possibility of a short circuit tall-- ine' place at such points.

It will now be apparent that I have devised a new and useful electrical controlling mechanism which embodies the features of advantage enumerated as desirable in the statement of the invention and the above description. and while I have, in the present instance, shown and described a preferred embodiment thereof which will give in practice satisfactory and reliable results. it is to be understood that this embodiment is susceptible of modification in various particulars without departing); from the spirit or scope of the invention or sacrificing any of its advantages.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. The combination with a motor having a double winding to effect its rotation in either direction. of a controller comprising a driven shaft, a cam thereon having a plu rality of cam faces. a rock arm actuated by said cam, contacts carried by said rock arm. resistance controlled by said contacts, a pair of rock arms, contacts thereon. cams on said shaft to actuate in timed relationship each of said pair of rock arms, resiliently mounted contacts to co-operate with the contacts of said rocker arms, and electrical connections with said contacts and moto windings whereby the direction of rotation of the motor is changed during the rotation of said driven shaft. 7

2. The combination with a motor having; a double windingto effect its rotation in either direction, of a controller comprising a driven shaft, a cam thereon, a roclr arm actuated by said cam, contacts carried by said rocl: arm. resistance controlled by said contacts. a pair of. rock arms. contacts thereon, cams on said shaft to actuate in timed relationship each of said pair of roclr arms. resiliently mounted contacts to co-operate with the contacts of said rocker arms, and electrical connections with said contacts and motor windings whereby the direction of rotation of the motor is changed during the rotation of said driven shaft.

The combination with a motor having a double winding to effect its rotation in either direction. of a controller comprising a driven shaft. a. cam thereon having plurality of cam faces, a rock arm actuated by said cam. contacts carried by said roclr arm. resistance controlled by said contacts. a pair of rock arms. contacts thereon. cams on said shaft to actuate in timed relationship each of said pair of rock arms, contacts to co-operate with the contacts of said rocker arm and electrical connections with said contacts and motor windings whereby the direction of rotation of the motor changed during the rotation of said driven shaft, said resistance being in when the contacts of said first rock arm are out of contact and being out when they are on contact.

a The combination with a motor haring; a double winding to effect its rotation in either direction, of a controller comprising a driven shaft, cam thereon, a rock arm actuated by said cam. contacts carried by said rock arm, resistance controlled by said contacts, a pair of rock arms, contact," rereon, cams on said shaft to actuate in timed relationship each of said pair of rock arms, means to cause the cai is of o. e 1' cl: arm to he positirei disengaged with their eo-operating contacts prior to the engagement of the contacts oi. the other rock arm of the pair with their co-operating; contacts, resiliently mounted contacts to co-operate with the contacts of said rocker arm, and electrical coi'mectious with said contacts and motor windings whei'eliy the direction of rotation of the motor is changed during the rotation of said driven shaft.

5. Tillie comhination with motor having a double winding to ei'iect its rotation in either direction, of a controller comprising a driven shaft, a cam adjustable thereon having a plurality 0t cam ta 'es, a. rock arm actuated by said cam, contacts carried by rock arm, resistance controlled by said contacts, a pair of rock arms, contacts thereon cams adjustable on said shaft to actuate in timed relationship each of said pair of rock arms, resiliently mounted contacts to (lo-operate ith the contacts of said rochcr arms, and electrical connections with said contacts and motor windings whereh the direc ion oi? rotation of the motor is changed during); the rotation of said driven shaft.

HARRY E. STAHL.

lVitnesses EMMA N, LEVIN, MARWN A. SPAULDTNG. 

